Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A touch panel system comprising: a signal generator configured to generate a reference signal; one or more channels, wherein each of the channels are configured to detect a touch; a sensing unit configured to sense the touch to output a sensing signal indicative of the touch event; a delay unit configured to receive the reference signal and adjust the reference signal based on a delay compensation value to compensate delay of the reference signal caused by the difference of distance between the signal generator and each of the channel; an operation unit configured to perform an operation on the sensing signal and the reference signal from the delay units to produce an operation result representing the difference between the sensing signal and the adjusted reference signal; a controller configured to determine the delay compensation value of the delay unit in each channel based on the operation result from the operation unit; and a reset signal generator configured to provide a reset signal or the adjusted reference signal to the delay unit in each channel by a user's request, at a preset time period, or at the driving of the touch panel system.
A touch panel system reduces input lag caused by the distance between the touch sensor and the signal generator. The system has a signal generator that emits a reference signal. Each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal. A delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value. An operation unit compares the adjusted reference signal and the touch sensor signal to find the difference. A controller determines the best delay value for each channel based on this difference. A reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal.
2. The touch panel system of claim 1 , wherein each of the channels further comprise an A/D converter configured to convert the operation result in the form of analog signal into a digital signal and outputs the converted digital signal to the controller.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, also includes an analog-to-digital (A/D) converter within each channel. This converter transforms the analog output from the operation unit (the difference between the signals) into a digital signal that is sent to the controller.
3. The touch panel system of claim 2 , wherein the controller comprises a delay calculator configured to calculate the delay compensation value of the delay unit in each channel based on the digital signal outputted from the operation unit.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal and where each channel has an A/D converter that transforms the analog output from the operation unit into a digital signal, further includes a delay calculator within the controller. The delay calculator analyzes the digital signal from the A/D converter to calculate the optimal delay compensation value for each channel's delay unit.
4. The touch panel system of claim 3 , wherein the controller comprises an initializer configured to generate the reset signal for allowing the reset signal generator to initialize the delay compensation value set to the delay unit in each channel.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, and where each channel has an A/D converter and the controller has a delay calculator, also includes an initializer within the controller. The initializer generates a reset signal that instructs the reset signal generator to reset the delay compensation value of the delay units in each channel.
5. The touch panel system of claim 4 , wherein the controller further comprises a delay setting unit configured to set an amount of delay of the reference signal corresponding to the delay compensation value.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, and where each channel has an A/D converter, the controller has a delay calculator and an initializer, also contains a delay setting unit within the controller. This unit configures the amount of delay to apply to the reference signal, according to the delay compensation value.
6. The touch panel system of claim 2 , wherein the delay calculator monitors a turning point at which the digital signal turns toward a negative direction from the positive direction to calculate the delay compensation value as the digital signal at the turning point.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, and where each channel has an A/D converter that transforms the analog output from the operation unit into a digital signal, calculates the delay compensation value by monitoring when the digital signal changes from a positive to a negative value (turning point). The delay compensation value is set to the digital signal value at that turning point.
7. The touch panel system of claim 1 , wherein each of the channels comprise a plurality of A/D converters configured to convert a voltage signal in the form of analog signal from the operation unit into a digital signal, wherein two or more channels share one A/D converter.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, uses multiple A/D converters to convert the analog voltage signal from the operation unit into a digital signal, and two or more channels share a single A/D converter.
8. The touch panel system of claim 1 , wherein the delay unit adjusts phase of the reference signal based on the delay compensation value and provides the adjusted reference signal to the operation unit.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, adjusts the *phase* of the reference signal based on the delay compensation value, and sends the phase-adjusted reference signal to the operation unit.
9. The touch panel system of claim 1 , wherein the delay unit includes flip-flops.
The touch panel system, as described where a signal generator emits a reference signal; each touch-sensitive area (channel) has a sensor that detects touch events and outputs a signal; a delay unit in each channel adjusts the timing of the reference signal to compensate for the difference in distance from the signal generator, using a specific delay value; an operation unit compares the adjusted reference signal and the touch sensor signal to find the difference; a controller determines the best delay value for each channel based on this difference; a reset signal generator allows a user, system timer, or system startup to reset the delay unit in each channel, or use the adjusted reference signal, implements the delay unit using flip-flops.
10. A method for compensating delay of a reference signal caused by the difference of distances among channels in a touch panel system, the method comprising: initializing each of the channels; obtaining a operation signal representing the difference between the reference signal and a sensing signal indicative of a touch made on the channel; calculating a delay compensation value of the channel based on the operation signal; adjusting the reference signal based on the delay compensation value to compensate the delay of the reference signal; and providing a reset signal or the adjusted reference signal to each channel by a user's request, at a preset time period, or at the driving of the touch panel system.
A method to compensate for signal delay in a touch panel caused by varying distances between sensors and a signal source. The method initializes each touch-sensitive area (channel). It obtains an operation signal representing the difference between a reference signal and the touch signal from a channel when touched. It calculates a delay compensation value for each channel based on that operation signal. Then, it adjusts the reference signal's timing using the calculated delay value to compensate for the delay. Finally, the method provides a reset signal or the adjusted reference signal to each channel when requested by the user, at a set time, or when the system starts.
11. The method of claim 10 , further comprising: converting the operation signal in the form of analog signal into a digital signal and outputs the converted digital signal to the controller.
The delay compensation method described where each touch-sensitive area (channel) is initialized, an operation signal is obtained, a delay compensation value is calculated, the reference signal's timing is adjusted, and a reset signal or adjusted reference signal is provided to each channel, also includes converting the analog operation signal into a digital signal before using it. The digital signal is sent to the controller.
12. The method of claim 11 , wherein said calculating a delay compensation value of the channel comprise: monitoring a turning point at which the digital signal turns toward a negative direction from the positive direction; and calculating the delay compensation value as the voltage signal at the turning point.
The delay compensation method, as described where each touch-sensitive area (channel) is initialized, an operation signal is obtained, a delay compensation value is calculated, the reference signal's timing is adjusted, a reset signal or adjusted reference signal is provided to each channel, and the analog operation signal is converted to digital, calculates the delay compensation value by monitoring the digital signal for a turning point where it transitions from positive to negative. The voltage signal at that turning point is used as the delay compensation value.
13. The method of claim 10 , said adjusting the reference signal comprises adjusting phase of the reference signal based on the delay compensation value.
The delay compensation method, as described where each touch-sensitive area (channel) is initialized, an operation signal is obtained, a delay compensation value is calculated, the reference signal's timing is adjusted, and a reset signal or adjusted reference signal is provided to each channel, adjusts the reference signal by modifying its *phase* based on the delay compensation value.
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November 11, 2014
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